dossor



F. M. DOSSOR. APPARATUS FOR CLEANING AND SEPARATING SEEDS, GRAIN, ANDTHE LIKE.

APPLICATION FILED OCT. 4,1920.

Patented May 9, 1922.

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F. M. DOSSOR. APPARATUS FOR CLEANING AND SEPARATING SEEDS, GRAIN,AND THELIKE.

APPLICATION FILED OCT. 4, I920 Patented May 9, 1922.

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APPARATUS FOR CLEANING AND SEPARATING SEEDS, GRAIN, AND THE LIKE.

Specification of Letters Patent.

Patented May 9, 1922.

Application filed October 4, 1920. Serial No. 414:,645.

'1 0 all whom it may concern Be it known that I, Fnnnnmcn h'lALooLiirDosson, of Balby, Doncaster, in the county of York, England, a subjectof the King of Great Britain and Ireland, have invented new and usefulImprovements in Apparatus for Cleaning and Separating Seeds, Grain, andthe like, (for which I have filed an application in England Sept. 3,1919,) of which the following is a specification.

This invention relates to sieve apparatus for cleaning and separatingseeds and grain, and also to combined sieve and belt apparatus for thesame purpose, for example, of

the type described in the specification of my prior Patent No. 115 1102.

My present improvements are designed firstly, to obtain a more perfector quivering upright vibratory separating motion of the sieves, and tocombine such upright vibratory separating motion (continuously operatingeither at one or both ends of the sieve) with a percussive motionmomentarily applied at predetermined and comparatively slow intervalspreferably in an upright direction for the purpose of clearing the sieveof adhering particles; secondly to employ a rotary sieve-clearing brushcarried by the driving chains; and thirdly to provide a driving gear inwhich the various speeds required for the sieve motions, for the feeddevice, and for any belt or other auxiliary separating apparatus thatmay be employed in conjunction with sieves are obtainable from a singlemain driving shaft.

Description 0/ accompanying drawing.

Figure 1 is a side elevation of my invention showing two sievessuperimposed.

Figure 2 is an end view of the lower sieve of Figure 1 showing the meansfortransmitting the drive and for creating the sieve motions.

Figure 3 is an elevation of rod mounted upon the driving chains andcarrying rollers which operate to effect the percussive motion of thesieves.

Figure 4 is a part of one end of the lower sieve showing a portion ofthe vibrating percussive mechanism connected therewith.

Figure 5 is a side view of lever arm supporting the sieves and forgiving the vibratory and percussive motions thereto.

According to my present invention the inclined sieve or pair ofsuperposed sieves A A, are mounted within a suitable upright rectangularframe B. A pair of cross shatt'ts C C i provided beneath each sieve, attop and bottom respectively, each cross-shalt being fitted at oppositeends, beneath the side of the sieve, with a pair of wheels D havingcontinuous rounded or compa 'atively shallow grooves E upon theirperipheries to give the desired continuous upright vibratory separatingmotion to the sieve A by means of the roller F F, interposed between theescalloped wheels D D and the corners of the sieves A A. But theserollers instead of being carried by the sieve 0r sieves directly, areeach carried at an intermediate point by a suitable lever arm (1' G,pivoted at H to the frame B or at J to a bracket K secured to thedriving chain support or guide bar L supported indirectly by the frame13 aforesaid. The arms G G, have terminal glOtbearings M adapted tosupport the sieve by means of slot pins or trunnions N fitting the saidslots M, projecting from the sides of each sieve at each end. sieves arethus detachable and interchangeable without any way interfering with thearms G G, or the rollers F F, as all that is required i to raise thesaid sieves until the pins N clear the slots M aforesaid.

Each lever arm G is formed with a downwardly projecting nose or camsurface P P, l

as shown in Fig. 5, on its underside, each pair of noses being adaptedto make contact with a pair of rollers R R at comparatively slowintervals, mounted on supporting rods S carried by the driving chains T'1. By this means a percussive clearing motion is imparted to the sieveat top and bottom alternately at intervals as aforesaid. Or in place ofthe rod and rollers, a cam projection, or triangular links, may beattached inside the chains so as to maize contact with the said noses PP, on the arms G G. 'A similar rod U also carried by the chains T T,supports a brush V constructed to rotate by contact with the undersideof each sieve A A. The bristles or pile of this brush arev short inlength so that as the brush revolves they pierce the perforations of thesieve and act vertically to dislodge anything therein which has not beenaffected by the percussive motion before described. Both the uprightvibratory motion and the percussive The "1 and chain wheels motion ofthe sieves are controlled by means of suitable spiral or other springs WWV, connected to each corner of the sieve to the frame B.

The escalloped wheels D D, for imparting the upright vibratory motion tothe sieves are driven in series by a single endless chain Y Y integralwith the wheels D D on each side of the machine, these chains carryingthe sieve clearing brush or brushes and part of the mechanism forimparting the percussive motion, as before described, and each chain hasguide wheels Z for maintaining the chain T in driving contact with theupper surface of the lower chain wheels Y Y, one of which guide wheels(mounted in a slotted bearing X) serves also as a tension wheel. Themachine haft C which first takes the drive (whether hand or power) hasits combined, escalloped and chain wheels D D, and Y Y, running looseupon it. 2 is a pulley keyed to shaft C and driven from any convenientcountershaft or the like. 3 is a chain wheel also keyed to said shaftand connected by the chain a: with a larger wheel 5 keyed to one of theupper pair of cross shafts C C, and the adjacent combined escalloped andchain wheels, being also keyed to said shaft, impart the necessary driveto the chains T T. 6, 6, are chain wheels and 7 a chain for operatingthe feed device. 8, 8, are chain wheels, and 9 a chain for operating theworm 10. The said shaft C may be run at any arranged fixed speed and begeared at one end direct to, any other selected speed of the machine,which other shaft becomes in turn the driving shatt- "l'or the sievemotions and the feed roller. The shatt C is further geared or has a stepcone 1i keyed on the opposite end to drive at any appropriate speed thebelt or other auxiliary separating apparatus where such is employed inconjunction with the sieves.

I claim 1. A sieve apparatus for cleaning and separating seeds, and thelike of the type aforesaid, comprising a frame, escallopcd wheels on theframe having rounded or comparatively shallow scallops; pivoted leverarms on the frame carrying a small roller engaging said scallops, pinsor trnnnions upon the sieves resting in slotted bearings in said arms,gears on the frame and driving chains to impart motion to the sieves.

2. A sieve apparatus for cleaning and separating seeds, and the like, asclaimed in claim 1, characterized by the lever arms having a camprojection or nose on the underside, and rollers or the like carried bythe driving chains of the sieve motions engaging said projections, asand for the purpose described.

3. A sieve apparatus for cleaning and separating seeds, and the like, asclaimed in claim 1, characterized by cross rod carricigl by the drivingchains of the sieve motions; and a brush mounted upon the said rod andrevoluble on contact with the underside of the ieve as and for thepurpose, shown and described.

F. M. DOSSOR.

